Annotate LeakyLazyInstance as a leak. Remove HeapChecker suppressions.

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
diff --git a/tools/heapcheck/suppressions.txt b/tools/heapcheck/suppressions.txt
index 1dd51b3ed61cb0f7772793f8e4b9dac4509c2e82..b2ee6828031f42617087a54a83b115d2f553f010 100644
--- a/tools/heapcheck/suppressions.txt
+++ b/tools/heapcheck/suppressions.txt
@@ -295,13 +295,6 @@
    fun:content::BrowserThreadTest_NotReleasedIfTargetThreadNonExistent_Test::TestBody
 }
 {
-   Intentional LeakyLazyInstanceTraits leaks
-   Heapcheck:Leak
-   ...
-   fun:base::internal::LeakyLazyInstanceTraits::New
-   fun:base::LazyInstance::Pointer
-}
-{
    Intentional leak in object tracking statics to avoid shutdown race
    Heapcheck:Leak
    ...
@@ -319,15 +312,6 @@
    fun:tracked_objects::ThreadData::TallyA*
 }
 {
-   NSS is initialized (LeakyLazyInstance) but intentionally never shut down
-   Heapcheck:Leak
-   ...
-   fun:InitSessionCacheLocks
-   fun:initSessionCacheLocksLazily
-   ...
-   fun:ssl_InitSessionCacheLocks
-}
-{
    FileStream::Context can leak through WorkerPool by design (Linux)
    Heapcheck:Leak
    fun:net::FileStream::FileStream